*{padding:0px; margin:0px;}
li{list-style-type:none;}
#box{width:800px; height:300px; margin:50px auto; position:relative}
#box ul li{width:800px; height:300px; position:absolute; display:none}
#box ol{position:absolute; right:-60px; top:0px;}
#box ol li{width:50px; height:50px; font-size:32px; background:#ccc; text-align:center; line-height:50px; margin-bottom:8px; cursor:pointer}
#box .active{background:orange; color:white;}
#box .btn{width:50px; height:70px; font-size:30px; cursor:pointer; text-align:center; line-height:70px; color:white; background:rgba(0,0,0,0.5); position:absolute; top:110px;}
#box .left{left:0px}
#box .right{right:0px;}


